Barrel-filter.



PTENTED MAY ad, 1905.

A. E. JOHNSON.

' BARREL FILTER.

APPLICATION FILED MAY 2o, 1904.

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y l y l PATENTED MAY 30, 1905.

A.Y.B. JOHNSON.

BARREL FILTER.

APPLICATION FILED MAY 20, 1904.

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ALFRED E. JOHNSON, OF COLORADO SPRINGS, COLORADO.

BARREL-FILTER.

SPECIFICATION forming part of Letters Patent No. 791,424, dated May'SO, 1905.

Application inea may zo, 1904. serai N5. 208,978.

To a/ZZ whom it may concern:

Be it known that I, ALFRED E. JOHNSON, a citizen of the United Statesof America, residing at Colorado Springs, in the county of El Pasoand State of Colorado, have invented certain new and useful Improvements in -Barrel-Filters; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of refer-V ence marked thereon, which form a part ofthis specification. c

My invention relates to improvements in barrel-filters, my object being to provide a filter of such material `that shall not be injuriously acted on by the chemicals employed in the treatment of ores and at the same time-to provide a construction adapted to thoroughly filter the dissolved solutions from the body or solid part of the ore charge and whereby the operation of filtration may be quickly and easily performed.

My further object is to provide astructure Y of this class which shall require but little at,-

tention and in which cleaning when required may oe accomplished without difficulty.

Still another object of my present invention is to provide a filter which it shall be practicable to make ofA soft material, as lead, and which shall possess sufficient strgth and weight as to render unnecessary anvadditional bed or support and which at the same time may be perforated to perform the filtering function Without the aid of other filtering material; and to this end my improved filter is composed ofboX-like sections Whose side edges engage the lining of the barrel and whose topiis raised sufciently above the lin-- being indicated by broken lines.

made by punching from the inside and with such a tool as to form conical orifices smallest at the top and increasing downwardly to prevent clogging during the carrying out or practice of the filtering operation. Any de# s'ired number'of box-like sections maybe employed. The bottom edges of these sections are grooved to permit filtration' at the sides. The said sections are heldin place by bolts or, other suitable fastening devices passed through lugs which engage the lining of the barrel and form a suitable support. These` lugs directly engage Washers.

Having briefly outlined my improved construction, as well as the function it is intended to perform, will proceed to describe the same in detail, reference being made to the accompanying drawings, in which is illus-` trated an embodiment thereof;

In the drawings, Figure 1 is a longitudinal section taken through a chlorination-barrel equipped With my improved filter. Fig. 2 is l a section taken through the filter-barrel, show,-

ing one of the filter sections in place and partly in section. This view is on a larger scale than Fig. l. Fig.` 3 is atop view of one of the filter-sections, the barrel and its lining Fig. 4 is an underneath view of a filter-section. Figs. 5 and 6 are sections taken on the lines 5 5 and 6 6, respectively, of Fig. 3. Fig. 7 is a fragmentary detail view illustrating the perforations of the lfilter, shown on a larger scale than in the other views.

The same reference characters indicate the same parts in all the views. v

Let A designate a chlorination-barrel provided With trunnions A', a manhole-head, and locking mechanism, (designated A2,) valvedinlets A3, and valved outlets Af. The lining of this barrel is designated A5 and is preferably of lead. Engaging the barrel, preferably directly opposite the manhole and the inlets A3, is the filter B, which, as shown in the draw.-

`inOs consists of a number of sections B arb 5 ranged end to end. The bottoms of the sides B2 of these sections are grooved, as shown at B3, and engage the lining of the barrel. The tops Bit of these sections are located a suficient distance from the lining of the barrel to form channels B5 below, whereby the filtered solution is allowed to pass freely from one section to the other. These sections are open at the ends, except the end sections, whose outer extremities are closed, as shown at BG. The tops of the sections are provided on their inner surface with depressions B7 of comparatively small area and arranged at n suitable intervals to give the required filtering-surface. The tops B8 of these depressions are comparatively thin, making it practicable to form perforations B9 therein by punching. The small area of these depressions makes it practicable to finely perforate the top of the sections corresponding to the depressed areas without unduly weakening the material. As shown in the drawings, each section is provided with a number of lugs B10. The bolts D have heads D', which, together with the adjacent unthreaded portion of the shank, is molded in the lugs of the sections to protect them from the action of the chemicals placed in the barrel. A suitable packing-washer C is placed between the bottom of the lug and the lining of the barrel to prevent the solution from reaching the shank of the bolt. This washer should be composed of some material, as asbestos, adapted to resist the action of the chemicals within the barrel. The outer shell of the barrel and its lining are provided with openings, through which the bolts pass and to whose outer extremities are applied nuts D2.

When the apparatus is in use, the ore charge is introduced through the manhole and the chemicals applied in any suitable manner. After the charge and the necessary chemicals for the purpose of dissolving the metallic values-in the practice of the chlorination process, for instance-the barrel is rotated a sufficient period to effect the dissolving of the metallic values. The barrel is then stopped in such position that the filter is at the bottom or lowest part of the barrel, after which the necessary pressure is applied to cause the dissolved solutions to pass through the perforations of the filtering areas. These solutions pass to the channel B5 underneath and are drawn off through the valved outlets A. By reason of the conical shape of the perforations B, whereby their smaller extremities are uppermost, there is less liability of elogging the peforations during the filtering'operations, since any particle small enough to enter the upper extremity of the perforation cannot possibly clog, as the perforation increases in size from its top downwardly.

Having thus described my invention, what I claim is- 1. In a filter, the combination with a suitable receptacle, of a filter applied to the inner surface of said receptacle and having edges engaging said surface, and a top raised above the surface to form a channel underneath, the edges of the filter having filtering-grooves where they engage the inner surface of the barrel, the top of the filter having depressions whereby the areas corresponding with these depressions are made comparatively thin, the said areas being provided with conical perforations whose smaller extremitiesare exposed to the material under treatment.

2. In a barrel-filter, the combination with a suitable barrel or cylinder, of a filter composed of a number of box-like sections placed end to end and forming a channel underneath, closed at the sides and extreme ends except for filtering-grooves with which the edges of the sections are provided, the tops of the sections being provided with a series of comparatively thin areas open to the inner passage of liquid.

3. ln a barrel-filter, the combination with a suitable barrel or cylinder, of a box-like filter whose side edges are applied to the inner surface of the barrel and whose top is provided with a series of relatively thin areas open to the filtering passage of liquid, and bolts whose inner extremities are molded in the material of the filter to protect them from the chemicals within the barrels, the outer extremities of the fastening-bolts being exposed and se cured by nuts, substantially as described.

In testimony whereof I afiix my signature 1n presence of two witnesses.

ALFRED E. JOHNSON.

Witnesses:

HOWARD MAsTnRsoN, CHARLES V. TURNER. 

